<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录页</title>
</head>
<body>
  <form action="/doLogin" method="post">
      用户名：<input name="username" /> <br/>
      密码： <input name="password" type="password"> <br/>
      <input type="submit"  value="登录"/>
  </form>
</body>
</html>